Try this homemade Penthouse Casserole recipe the whole family will love. Made with macaroni, cream of celery soup, tuna fish and mushrooms. Easy step-by…
This Penthouse Casserole relies on simple, everyday ingredients such as cream of celery soup, tuna fish, drained, milk and finely chopped onion. It comes together quickly and makes 4 servings, at about 360 kcal each. The step-by-step instructions below are written to be easy to follow, even on a busy day.
It's versatile enough for an easy weeknight dinner yet satisfying enough for guests at the weekend. Serve it with your favorite sides, and keep any leftovers for a quick meal the next day.
Updated Jun 30, 2026